1.23.2 fails to build on cygwin for LLADDR

[matzeri]

1.23.1 builds fine on cygwin 64 bit

1.23.2 fails as

bsd-ifaddrs.c:128:36: warning: implicit declaration of function ‘LLADDR’; did yo
u mean ‘EBADR’? [-Wimplicit-function-declaration]
         memcpy(address->phys_addr, LLADDR(sa_addr), sizeof(address->phys_addr))
;
                                    ^
[cut ...]
CCLD     libuv.la
src/unix/.libs/libuv_la-bsd-ifaddrs.o: In function `uv_interface_addresses':
/usr/src/debug/libuv-1.23.2-1/src/unix/bsd-ifaddrs.c:128: undefined reference to `LLADDR'
/usr/src/debug/libuv-1.23.2-1/src/unix/bsd-ifaddrs.c:128:(.text+0x166): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `LLADDR'
collect2: error: ld returned 1 exit status
make: *** [Makefile:1336: libuv.la] Error 1

Also adding the Linux definition of the macro does not work as

  CC       src/unix/libuv_la-bsd-ifaddrs.lo
In file included from /usr/include/string.h:180:0,
                 from /cygdrive/d/cyg_pub/devel/libuv/libuv-1.23.2-1.x86_64/src/libuv-1.23.2/src/unix/internal.h:29,
                 from /cygdrive/d/cyg_pub/devel/libuv/libuv-1.23.2-1.x86_64/src/libuv-1.23.2/src/unix/bsd-ifaddrs.c:23:
/cygdrive/d/cyg_pub/devel/libuv/libuv-1.23.2-1.x86_64/src/libuv-1.23.2/src/unix/bsd-ifaddrs.c: In function ‘uv_interface_addresses’:
/cygdrive/d/cyg_pub/devel/libuv/libuv-1.23.2-1.x86_64/src/libuv-1.23.2/include/uv.h:1587:33: error: dereferencing pointer to incomplete type ‘struct sockaddr_dl’
 #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen))
                                 ^
/cygdrive/d/cyg_pub/devel/libuv/libuv-1.23.2-1.x86_64/src/libuv-1.23.2/src/unix/bsd-ifaddrs.c:128:36: note: in expansion of macro ‘LLADDR’
         memcpy(address->phys_addr, LLADDR(sa_addr), sizeof(address->phys_addr));
                                    ^~~~~~
make: *** [Makefile:2280: src/unix/libuv_la-bsd-ifaddrs.lo] Error 1

[cjihrig]

@matzeri does #2035 fix things?

[matzeri]

It builds fine as before with 1.23.1